Revert "[JITLink] Enable exception handling for ELF."

This reverts commit 6884fbc2c4.
Breaks tests on Windows: http://45.33.8.238/win/31981/step_11.txt

llvm/lib/ExecutionEngine/JITLink/EHFrameSupport.cpp

@@ -119,10 +119,9 @@ Error EHFrameSplitter::processBlock(LinkGraph &G, Block &B,
 }
 
 EHFrameEdgeFixer::EHFrameEdgeFixer(StringRef EHFrameSectionName,
-                                   unsigned PointerSize, Edge::Kind Delta64,
+                                   Edge::Kind Delta64, Edge::Kind NegDelta32)
-                                   Edge::Kind Delta32, Edge::Kind NegDelta32)
+    : EHFrameSectionName(EHFrameSectionName), Delta64(Delta64),
-    : EHFrameSectionName(EHFrameSectionName), PointerSize(PointerSize),
+      NegDelta32(NegDelta32) {}
-      Delta64(Delta64), Delta32(Delta32), NegDelta32(NegDelta32) {}
 
 Error EHFrameEdgeFixer::operator()(LinkGraph &G) {
   auto *EHFrame = G.findSectionByName(EHFrameSectionName);
@@ -135,11 +134,6 @@ Error EHFrameEdgeFixer::operator()(LinkGraph &G) {
     return Error::success();
   }
 
-  // Check that we support the graph's pointer size.
-  if (G.getPointerSize() != 4 && G.getPointerSize() != 8)
-    return make_error<JITLinkError>(
-        "EHFrameEdgeFixer only supports 32 and 64 bit targets");
-
   LLVM_DEBUG({
     dbgs() << "EHFrameEdgeFixer: Processing " << EHFrameSectionName << "...\n";
   });
@@ -264,6 +258,7 @@ Error EHFrameEdgeFixer::processBlock(ParseContext &PC, Block &B) {
 Error EHFrameEdgeFixer::processCIE(ParseContext &PC, Block &B,
                                    size_t RecordOffset, size_t RecordLength,
                                    size_t CIEDeltaFieldOffset) {
+  using namespace dwarf;
 
   LLVM_DEBUG(dbgs() << "      Record is CIE\n");
 
@@ -334,12 +329,11 @@ Error EHFrameEdgeFixer::processCIE(ParseContext &PC, Block &B,
       uint8_t LSDAPointerEncoding;
       if (auto Err = RecordReader.readInteger(LSDAPointerEncoding))
         return Err;
-      if (!isSupportedPointerEncoding(LSDAPointerEncoding))
+      if (LSDAPointerEncoding != (DW_EH_PE_pcrel | DW_EH_PE_absptr))
         return make_error<JITLinkError>(
             "Unsupported LSDA pointer encoding " +
             formatv("{0:x2}", LSDAPointerEncoding) + " in CIE at " +
             formatv("{0:x16}", CIESymbol.getAddress()));
-      CIEInfo.LSDAPointerEncoding = LSDAPointerEncoding;
       break;
     }
     case 'P': {
@@ -347,8 +341,7 @@ Error EHFrameEdgeFixer::processCIE(ParseContext &PC, Block &B,
       if (auto Err = RecordReader.readInteger(PersonalityPointerEncoding))
         return Err;
       if (PersonalityPointerEncoding !=
-          (dwarf::DW_EH_PE_indirect | dwarf::DW_EH_PE_pcrel |
+          (DW_EH_PE_indirect | DW_EH_PE_pcrel | DW_EH_PE_sdata4))
-           dwarf::DW_EH_PE_sdata4))
         return make_error<JITLinkError>(
             "Unspported personality pointer "
             "encoding " +
@@ -363,12 +356,12 @@ Error EHFrameEdgeFixer::processCIE(ParseContext &PC, Block &B,
       uint8_t FDEPointerEncoding;
       if (auto Err = RecordReader.readInteger(FDEPointerEncoding))
         return Err;
-      if (!isSupportedPointerEncoding(FDEPointerEncoding))
+      if (FDEPointerEncoding != (DW_EH_PE_pcrel | DW_EH_PE_absptr))
         return make_error<JITLinkError>(
-            "Unsupported FDE pointer encoding " +
+            "Unsupported FDE address pointer "
+            "encoding " +
             formatv("{0:x2}", FDEPointerEncoding) + " in CIE at " +
             formatv("{0:x16}", CIESymbol.getAddress()));
-      CIEInfo.FDEPointerEncoding = FDEPointerEncoding;
       break;
     }
     default:
@@ -452,13 +445,11 @@ Error EHFrameEdgeFixer::processFDE(ParseContext &PC, Block &B,
     JITTargetAddress PCBeginFieldOffset = RecordReader.getOffset();
     auto PCEdgeItr = BlockEdges.find(RecordOffset + PCBeginFieldOffset);
     if (PCEdgeItr == BlockEdges.end()) {
-      auto PCBeginPtrInfo =
+      auto PCBeginDelta = readAbsolutePointer(PC.G, RecordReader);
-          readEncodedPointer(CIEInfo->FDEPointerEncoding,
+      if (!PCBeginDelta)
-                             RecordAddress + PCBeginFieldOffset, RecordReader);
+        return PCBeginDelta.takeError();
-      if (!PCBeginPtrInfo)
+      JITTargetAddress PCBegin =
-        return PCBeginPtrInfo.takeError();
+          RecordAddress + PCBeginFieldOffset + *PCBeginDelta;
-      JITTargetAddress PCBegin = PCBeginPtrInfo->first;
-      Edge::Kind PCBeginEdgeKind = PCBeginPtrInfo->second;
       LLVM_DEBUG({
         dbgs() << "        Adding edge at "
                << formatv("{0:x16}", RecordAddress + PCBeginFieldOffset)
@@ -467,8 +458,7 @@ Error EHFrameEdgeFixer::processFDE(ParseContext &PC, Block &B,
       auto PCBeginSym = getOrCreateSymbol(PC, PCBegin);
       if (!PCBeginSym)
         return PCBeginSym.takeError();
-      B.addEdge(PCBeginEdgeKind, RecordOffset + PCBeginFieldOffset, *PCBeginSym,
+      B.addEdge(Delta64, RecordOffset + PCBeginFieldOffset, *PCBeginSym, 0);
-                0);
       PCBeginBlock = &PCBeginSym->getBlock();
     } else {
       auto &EI = PCEdgeItr->second;
@@ -489,42 +479,38 @@ Error EHFrameEdgeFixer::processFDE(ParseContext &PC, Block &B,
                                         " points at external block");
       }
       PCBeginBlock = &EI.Target->getBlock();
-      if (auto Err = RecordReader.skip(
+      if (auto Err = RecordReader.skip(PC.G.getPointerSize()))
-              getPointerEncodingDataSize(CIEInfo->FDEPointerEncoding)))
         return Err;
     }
 
     // Add a keep-alive edge from the FDE target to the FDE to ensure that the
     // FDE is kept alive if its target is.
     assert(PCBeginBlock && "PC-begin block not recorded");
-    LLVM_DEBUG({
-      dbgs() << "        Adding keep-alive edge from target at "
-             << formatv("{0:x16}", PCBeginBlock->getAddress()) << " to FDE at "
-             << formatv("{0:x16}", RecordAddress) << "\n";
-    });
     PCBeginBlock->addEdge(Edge::KeepAlive, 0, FDESymbol, 0);
   }
 
   // Skip over the PC range size field.
-  if (auto Err = RecordReader.skip(
+  if (auto Err = RecordReader.skip(PC.G.getPointerSize()))
-          getPointerEncodingDataSize(CIEInfo->FDEPointerEncoding)))
     return Err;
 
   if (CIEInfo->FDEsHaveLSDAField) {
     uint64_t AugmentationDataSize;
     if (auto Err = RecordReader.readULEB128(AugmentationDataSize))
       return Err;
+    if (AugmentationDataSize != PC.G.getPointerSize())
+      return make_error<JITLinkError>(
+          "Unexpected FDE augmentation data size (expected " +
+          Twine(PC.G.getPointerSize()) + ", got " +
+          Twine(AugmentationDataSize) + ") for FDE at " +
+          formatv("{0:x16}", RecordAddress));
 
     JITTargetAddress LSDAFieldOffset = RecordReader.getOffset();
     auto LSDAEdgeItr = BlockEdges.find(RecordOffset + LSDAFieldOffset);
     if (LSDAEdgeItr == BlockEdges.end()) {
-      auto LSDAPointerInfo =
+      auto LSDADelta = readAbsolutePointer(PC.G, RecordReader);
-          readEncodedPointer(CIEInfo->LSDAPointerEncoding,
+      if (!LSDADelta)
-                             RecordAddress + LSDAFieldOffset, RecordReader);
+        return LSDADelta.takeError();
-      if (!LSDAPointerInfo)
+      JITTargetAddress LSDA = RecordAddress + LSDAFieldOffset + *LSDADelta;
-        return LSDAPointerInfo.takeError();
-      JITTargetAddress LSDA = LSDAPointerInfo->first;
-      Edge::Kind LSDAEdgeKind = LSDAPointerInfo->second;
       auto LSDASym = getOrCreateSymbol(PC, LSDA);
       if (!LSDASym)
         return LSDASym.takeError();
@@ -533,7 +519,7 @@ Error EHFrameEdgeFixer::processFDE(ParseContext &PC, Block &B,
                << formatv("{0:x16}", RecordAddress + LSDAFieldOffset)
                << " to LSDA at " << formatv("{0:x16}", LSDA) << "\n";
       });
-      B.addEdge(LSDAEdgeKind, RecordOffset + LSDAFieldOffset, *LSDASym, 0);
+      B.addEdge(Delta64, RecordOffset + LSDAFieldOffset, *LSDASym, 0);
     } else {
       LLVM_DEBUG({
         auto &EI = LSDAEdgeItr->second;
@@ -544,7 +530,7 @@ Error EHFrameEdgeFixer::processFDE(ParseContext &PC, Block &B,
           dbgs() << " + " << formatv("{0:x16}", EI.Addend);
         dbgs() << "\n";
       });
-      if (auto Err = RecordReader.skip(AugmentationDataSize))
+      if (auto Err = RecordReader.skip(PC.G.getPointerSize()))
         return Err;
     }
   } else {
@@ -595,110 +581,23 @@ EHFrameEdgeFixer::parseAugmentationString(BinaryStreamReader &RecordReader) {
   return std::move(AugInfo);
 }
 
-bool EHFrameEdgeFixer::isSupportedPointerEncoding(uint8_t PointerEncoding) {
+Expected<JITTargetAddress>
-  using namespace dwarf;
+EHFrameEdgeFixer::readAbsolutePointer(LinkGraph &G,
-
-  // We only support PC-rel for now.
-  if ((PointerEncoding & 0x70) != DW_EH_PE_pcrel)
-    return false;
-
-  // readEncodedPointer does not handle indirect.
-  if (PointerEncoding & DW_EH_PE_indirect)
-    return false;
-
-  // Supported datatypes.
-  switch (PointerEncoding & 0xf) {
-  case DW_EH_PE_absptr:
-  case DW_EH_PE_udata4:
-  case DW_EH_PE_udata8:
-  case DW_EH_PE_sdata4:
-  case DW_EH_PE_sdata8:
-    return true;
-  }
-
-  return false;
-}
-
-unsigned EHFrameEdgeFixer::getPointerEncodingDataSize(uint8_t PointerEncoding) {
-  using namespace dwarf;
-
-  assert(isSupportedPointerEncoding(PointerEncoding) &&
-         "Unsupported pointer encoding");
-  switch (PointerEncoding & 0xf) {
-  case DW_EH_PE_absptr:
-    return PointerSize;
-  case DW_EH_PE_udata4:
-  case DW_EH_PE_sdata4:
-    return 4;
-  case DW_EH_PE_udata8:
-  case DW_EH_PE_sdata8:
-    return 8;
-  default:
-    llvm_unreachable("Unsupported encoding");
-  }
-}
-
-Expected<std::pair<JITTargetAddress, Edge::Kind>>
-EHFrameEdgeFixer::readEncodedPointer(uint8_t PointerEncoding,
-                                     JITTargetAddress PointerFieldAddress,
                                       BinaryStreamReader &RecordReader) {
   static_assert(sizeof(JITTargetAddress) == sizeof(uint64_t),
                 "Result must be able to hold a uint64_t");
-  assert(isSupportedPointerEncoding(PointerEncoding) &&
-         "Unsupported pointer encoding");
-
-  using namespace dwarf;
-
-  // Isolate data type, remap absptr to udata4 or udata8. This relies on us
-  // having verified that the graph uses 32-bit or 64-bit pointers only at the
-  // start of this pass.
-  uint8_t EffectiveType = PointerEncoding & 0xf;
-  if (EffectiveType == DW_EH_PE_absptr)
-    EffectiveType = (PointerSize == 8) ? DW_EH_PE_udata8 : DW_EH_PE_udata4;
-
   JITTargetAddress Addr;
-  Edge::Kind PointerEdgeKind;
+  if (G.getPointerSize() == 8) {
-  switch (EffectiveType) {
+    if (auto Err = RecordReader.readInteger(Addr))
-  case DW_EH_PE_udata4: {
-    uint32_t Val;
-    if (auto Err = RecordReader.readInteger(Val))
       return std::move(Err);
-    Addr = PointerFieldAddress + Val;
+  } else if (G.getPointerSize() == 4) {
-    PointerEdgeKind = Delta32;
+    uint32_t Addr32;
-    break;
+    if (auto Err = RecordReader.readInteger(Addr32))
-  }
-  case DW_EH_PE_udata8: {
-    uint64_t Val;
-    if (auto Err = RecordReader.readInteger(Val))
       return std::move(Err);
-    Addr = PointerFieldAddress + Val;
+    Addr = Addr32;
-    PointerEdgeKind = Delta64;
+  } else
-    break;
+    llvm_unreachable("Pointer size is not 32-bit or 64-bit");
-  }
+  return Addr;
-  case DW_EH_PE_sdata4: {
-    int32_t Val;
-    if (auto Err = RecordReader.readInteger(Val))
-      return std::move(Err);
-    Addr = PointerFieldAddress + Val;
-    PointerEdgeKind = Delta32;
-    break;
-  }
-  case DW_EH_PE_sdata8: {
-    int64_t Val;
-    if (auto Err = RecordReader.readInteger(Val))
-      return std::move(Err);
-    Addr = PointerFieldAddress + Val;
-    PointerEdgeKind = Delta64;
-    break;
-  }
-  }
-
-  if (PointerEdgeKind == Edge::Invalid)
-    return make_error<JITLinkError>(
-        "Unspported edge kind for encoded pointer at " +
-        formatv("{0:x}", PointerFieldAddress));
-
-  return std::make_pair(Addr, Delta64);
 }
 
 Expected<Symbol &> EHFrameEdgeFixer::getOrCreateSymbol(ParseContext &PC,

llvm/lib/ExecutionEngine/JITLink/EHFrameSupportImpl.h

@@ -40,8 +40,7 @@ private:
 /// edges.
 class EHFrameEdgeFixer {
 public:
-  EHFrameEdgeFixer(StringRef EHFrameSectionName, unsigned PointerSize,
+  EHFrameEdgeFixer(StringRef EHFrameSectionName, Edge::Kind Delta64,
-                   Edge::Kind Delta64, Edge::Kind Delta32,
                    Edge::Kind NegDelta32);
   Error operator()(LinkGraph &G);
 
@@ -58,8 +57,6 @@ private:
     CIEInformation(Symbol &CIESymbol) : CIESymbol(&CIESymbol) {}
     Symbol *CIESymbol = nullptr;
     bool FDEsHaveLSDAField = false;
-    uint8_t FDEPointerEncoding = 0;
-    uint8_t LSDAPointerEncoding = 0;
   };
 
   struct EdgeTarget {
@@ -99,20 +96,12 @@ private:
 
   Expected<AugmentationInfo>
   parseAugmentationString(BinaryStreamReader &RecordReader);
-
+  Expected<JITTargetAddress>
-  static bool isSupportedPointerEncoding(uint8_t PointerEncoding);
+  readAbsolutePointer(LinkGraph &G, BinaryStreamReader &RecordReader);
-  unsigned getPointerEncodingDataSize(uint8_t PointerEncoding);
-  Expected<std::pair<JITTargetAddress, Edge::Kind>>
-  readEncodedPointer(uint8_t PointerEncoding,
-                     JITTargetAddress PointerFieldAddress,
-                     BinaryStreamReader &RecordReader);
-
   Expected<Symbol &> getOrCreateSymbol(ParseContext &PC, JITTargetAddress Addr);
 
   StringRef EHFrameSectionName;
-  unsigned PointerSize;
   Edge::Kind Delta64;
-  Edge::Kind Delta32;
   Edge::Kind NegDelta32;
 };
 

llvm/lib/ExecutionEngine/JITLink/ELF_x86_64.cpp

@@ -11,14 +11,12 @@
 //===----------------------------------------------------------------------===//
 
 #include "llvm/ExecutionEngine/JITLink/ELF_x86_64.h"
+#include "BasicGOTAndStubsBuilder.h"
+#include "JITLinkGeneric.h"
 #include "llvm/ExecutionEngine/JITLink/JITLink.h"
 #include "llvm/Object/ELFObjectFile.h"
 #include "llvm/Support/Endian.h"
 
-#include "BasicGOTAndStubsBuilder.h"
-#include "EHFrameSupportImpl.h"
-#include "JITLinkGeneric.h"
-
 #define DEBUG_TYPE "jitlink"
 
 using namespace llvm;
@@ -240,8 +238,6 @@ private:
     switch (Type) {
     case ELF::R_X86_64_PC32:
       return ELF_x86_64_Edges::ELFX86RelocationKind::PCRel32;
-    case ELF::R_X86_64_PC64:
-      return ELF_x86_64_Edges::ELFX86RelocationKind::Delta64;
     case ELF::R_X86_64_64:
       return ELF_x86_64_Edges::ELFX86RelocationKind::Pointer64;
     case ELF::R_X86_64_GOTPCREL:
@@ -408,6 +404,9 @@ private:
       LLVM_DEBUG({
         dbgs() << "Adding relocations from section " << *RelSectName << "\n";
       });
+      // Deal with .eh_frame later
+      if (*RelSectName == StringRef(".rela.eh_frame"))
+        continue;
 
       auto UpdateSection = Obj.getSection(SecRef.sh_info);
       if (!UpdateSection)
@@ -735,11 +734,6 @@ private:
       *(ulittle64_t *)FixupPtr = Value;
       break;
     }
-    case ELFX86RelocationKind::Delta64: {
-      int64_t Value = E.getTarget().getAddress() + E.getAddend() - FixupAddress;
-      *(little64_t *)FixupPtr = Value;
-      break;
-    }
     }
     return Error::success();
   }
@@ -766,12 +760,6 @@ void link_ELF_x86_64(std::unique_ptr<LinkGraph> G,
                      std::unique_ptr<JITLinkContext> Ctx) {
   PassConfiguration Config;
 
-  if (Ctx->shouldAddDefaultTargetPasses(G->getTargetTriple())) {
-
-    Config.PrePrunePasses.push_back(EHFrameSplitter(".eh_frame"));
-    Config.PrePrunePasses.push_back(EHFrameEdgeFixer(
-        ".eh_frame", G->getPointerSize(), Delta64, Delta32, NegDelta32));
-
   // Construct a JITLinker and run the link function.
   // Add a mark-live pass.
   if (auto MarkLive = Ctx->getMarkLivePass(G->getTargetTriple()))
@@ -787,7 +775,6 @@ void link_ELF_x86_64(std::unique_ptr<LinkGraph> G,
 
   // Add GOT/Stubs optimizer pass.
   Config.PreFixupPasses.push_back(optimizeELF_x86_64_GOTAndStubs);
-  }
 
   if (auto Err = Ctx->modifyPassConfig(G->getTargetTriple(), Config))
     return Ctx->notifyFailed(std::move(Err));

llvm/lib/ExecutionEngine/JITLink/MachOLinkGraphBuilder.h

@@ -16,10 +16,10 @@
 #include "llvm/ADT/DenseMap.h"
 #include "llvm/ADT/StringMap.h"
 #include "llvm/ExecutionEngine/JITLink/JITLink.h"
-#include "llvm/Object/MachO.h"
 
 #include "EHFrameSupportImpl.h"
 #include "JITLinkGeneric.h"
+#include "llvm/Object/MachO.h"
 
 #include <list>
 

llvm/lib/ExecutionEngine/JITLink/MachO_x86_64.cpp

@@ -669,8 +669,8 @@ void link_MachO_x86_64(std::unique_ptr<LinkGraph> G,
   if (Ctx->shouldAddDefaultTargetPasses(G->getTargetTriple())) {
     // Add eh-frame passses.
     Config.PrePrunePasses.push_back(EHFrameSplitter("__eh_frame"));
-    Config.PrePrunePasses.push_back(EHFrameEdgeFixer(
+    Config.PrePrunePasses.push_back(
-        "__eh_frame", G->getPointerSize(), Delta64, Delta32, NegDelta32));
+        EHFrameEdgeFixer("__eh_frame", Delta64, NegDelta32));
 
     // Add a mark-live pass.
     if (auto MarkLive = Ctx->getMarkLivePass(G->getTargetTriple()))

llvm/test/ExecutionEngine/JITLink/X86/ELF_ehframe_basic.s

@@ -1,115 +0,0 @@
-# REQUIRES: asserts
-# RUN: llvm-mc -triple=x86_64-unknown-linux -position-independent \
-# RUN:     -filetype=obj -o %t %s
-# RUN: llvm-jitlink -debug-only=jitlink -define-abs bar=0x01 -noexec %t 2>&1 | \
-# RUN:     FileCheck %s
-#
-# Check that a basic .eh-frame section is recognized and parsed. We
-# Expect to see two FDEs with corresponding keep-alive edges.
-#
-# CHECK: Adding keep-alive edge from target at {{.*}} to FDE at
-# CHECK: Adding keep-alive edge from target at {{.*}} to FDE at
-
-	.text
-	.file	"exceptions.cpp"
-	.globl	foo
-	.p2align	4, 0x90
-	.type	foo,@function
-foo:
-	.cfi_startproc
-
-	pushq	%rax
-	.cfi_def_cfa_offset 16
-	movl	$4, %edi
-	callq	__cxa_allocate_exception@PLT
-	movl	$1, (%rax)
-	movq	_ZTIi@GOTPCREL(%rip), %rsi
-	movq	%rax, %rdi
-	xorl	%edx, %edx
-	callq	__cxa_throw@PLT
-.Lfunc_end0:
-	.size	foo, .Lfunc_end0-foo
-	.cfi_endproc
-
-	.globl	main
-	.p2align	4, 0x90
-	.type	main,@function
-main:
-.Lfunc_begin0:
-	.cfi_startproc
-	.cfi_personality 155, DW.ref.__gxx_personality_v0
-	.cfi_lsda 27, .Lexception0
-
-	pushq	%rbx
-	.cfi_def_cfa_offset 16
-	.cfi_offset %rbx, -16
-	xorl	%ebx, %ebx
-.Ltmp0:
-	callq	bar@PLT
-.Ltmp1:
-
-	movl	%ebx, %eax
-	popq	%rbx
-	.cfi_def_cfa_offset 8
-	retq
-.LBB1_1:
-	.cfi_def_cfa_offset 16
-.Ltmp2:
-	movq	%rax, %rdi
-	callq	__cxa_begin_catch@PLT
-	callq	__cxa_end_catch@PLT
-	movl	$1, %ebx
-	movl	%ebx, %eax
-	popq	%rbx
-	.cfi_def_cfa_offset 8
-	retq
-.Lfunc_end1:
-	.size	main, .Lfunc_end1-main
-	.cfi_endproc
-	.section	.gcc_except_table,"a",@progbits
-	.p2align	2
-GCC_except_table1:
-.Lexception0:
-	.byte	255
-	.byte	156
-	.uleb128 .Lttbase0-.Lttbaseref0
-.Lttbaseref0:
-	.byte	1
-	.uleb128 .Lcst_end0-.Lcst_begin0
-.Lcst_begin0:
-	.uleb128 .Ltmp0-.Lfunc_begin0
-	.uleb128 .Ltmp1-.Ltmp0
-	.uleb128 .Ltmp2-.Lfunc_begin0
-	.byte	1
-	.uleb128 .Ltmp1-.Lfunc_begin0
-	.uleb128 .Lfunc_end1-.Ltmp1
-	.byte	0
-	.byte	0
-.Lcst_end0:
-	.byte	1
-
-	.byte	0
-	.p2align	2
-
-.Ltmp3:
-	.quad	.L_ZTIi.DW.stub-.Ltmp3
-.Lttbase0:
-	.p2align	2
-
-	.data
-	.p2align	3
-.L_ZTIi.DW.stub:
-	.quad	_ZTIi
-	.hidden	DW.ref.__gxx_personality_v0
-	.weak	DW.ref.__gxx_personality_v0
-	.section	.data.DW.ref.__gxx_personality_v0,"aGw",@progbits,DW.ref.__gxx_personality_v0,comdat
-	.p2align	3
-	.type	DW.ref.__gxx_personality_v0,@object
-	.size	DW.ref.__gxx_personality_v0, 8
-DW.ref.__gxx_personality_v0:
-	.quad	__gxx_personality_v0
-	.ident	"clang version 12.0.0 (git@github.com:llvm/llvm-project.git afd483e57d166418e94a65bd9716e7dc4c114eed)"
-	.section	".note.GNU-stack","",@progbits
-	.addrsig
-	.addrsig_sym __gxx_personality_v0
-	.addrsig_sym _ZTIi